A man wearing a long straitjacket and it has belts to hold him

A man wearing a long straitjacket and it has belts to hold him. This man has gray skin. His nails have been transformed into claws. He is covered in blood. In his left hand, he is holding a bitten arm. In his right hand, he is holding a hammer made of human bones. He is full of scars. He is bald on one side only. His eyes are glowing purple. He is leaving an abandoned sanatorium and . There is a tree in the center of the sanatorium that has people hanging from it. The image has to be a horror anime.